【 Weak current College 】 room decoration design requirements, power supply, ground covers

1. room design requirements
Room is the comprehensive wiring system and computer network equipment room, which is for network administration and management staff on duty. The engine had a total distribution frame, telephone, data and images, computer and other host equipment and security equipment.

Specific application, the ground floor with anti-static activities, aerial 300mm. The rooms have a private air conditioning, and in the middle of the aluminum panel, etc.

The engine should be grounded. Equipment room at room temperature should be kept at a temperature of 15 ° to 30 ° c, relative humidity should be maintained at 45% to 65%. Device should be installed in compliance with the regulatory requirements of the fire protection system, you should use at least fire security doors, fire-resistant 1 hour firewall. Equipment room all equipment should have adequate space for installation, including: total distribution frame, telephone switch or computer host, etc. Equipment room decoration, air-conditioning systems and electrical lighting installation should be installed before. Equipment room decoration should meet the technological requirements, economical. Larger rooms can be combined with air conditioning air, between walk and anti-static requirements, sets the active floor. Equipment room should prevent harmful gases (such as SO2, H2S, NO2, NH3, etc) of intrusion, and should have good dust control measures that allow dust content limits may see the following table:

Allow dust limit value table:

Dust particles with diameter (um): 0.5 ~ 3.5

Dust particles with the largest concentration (particle number/m3) 1.4 × 107, 7x105, 2.4x105, 1.3x107

Note: ash particles should be can't conductive, non-magnetic and non-corrosive.

Should at least provide for the device from the floor up 2.55 m height, the height of the door should be greater than 2.1 m, door width should be greater than 90 cm, with floor live load equivalent uniform shall be greater than 5kN/m2. Those who install the cabling and hardware, walls and ceilings should be fire-retardant paint coating.

General lighting between devices, the minimum standard should be a requirement of illuminance 150lx, illuminated, horizontal illuminance refers to the distance from ground 0.8 metres vertical illuminance refers to the distance from ground 1.4 metres.

2.PDS system for power system requirements

Equipment room placement computer host, you should follow the computer host power requirements for room design. Device placed telephone PBX or phone module devices, you should follow the industrial enterprises of PABX engineering design specifications CECS09: 89 "or the corresponding telephone Office used the switch room design specifications for design.

Room 380V three-phase AC introduced by individual distribution room to room AC power distribution box, power should be stabilized before the host, air-conditioning lighting power supply another add-in. And as far as possible provide two ways power supply, UPS uninterruptible power supply system of the building as a host and related equipment and room Manager service.

Equipment and wiring compartment should have reliable AC 220V/50Hz power supply.

Recommends that each or every group information outlets nearby located a single-phase and three-wire power outlet.

3.PDS system on electrical protection and earthing requirements

① P D S system the existence of the surrounding environment, electromagnetic interference shielding measures must be used to suppress external electromagnetic interference.

② wiring pipes (wiring ducts have unshielded twisted pair cable) and electromagnetic interference sources. Are listed in the following table.

Wiring pipes and electromagnetic interference between the minimum separation distance

Near to the voltage is less than 500V power line and power equipment

Electromagnetic interference sources lamp transformers and electrical power line without shielding or power equipment without shielding of power line or power equipment power line wear a grounded metal pipe

<2kVA2-5kVA>5kVA<2kVA2-5kVA>5kVA<2kVA2-5kVA>5kVA

Wiring conduit pipe nonmetallic wiring grounded metal wiring pipes grounded metal wiring duct

Minimum separation distance (m) 0.31.10.130.310.610.070.150.300.080.15

Note: separate wiring PDS system in General, you should keep at least with power line 1m above. At the same time, the cable must be away from a bulk of motors, generators, induction heaters, arc welder, x-ray equipment, radio frequency, microwave or radar source, such as interference signal source.

③ P D S system shield copper cable, its paragraphs of shielded cable layer should remain connected and grounding, welding shields should be nearby.

④ P D S system in place to screen non-shielded copper cable in metallic iron pipes or metal cable trunking (bridge) along the route, the section steel pipes or metal cable tray should have solid electrical connections and grounded.

⑤ Shield continuity grounding can not be guaranteed, that should be in every piece of unshielded twisted-pair cable layout next to the core of a bare copper wire grounded, play a protective effect of shielding, stream, or direct use of shielded twisted pair cable.

⑥ P D S system link cable location should be located in the central part of a building should not be in the four corners of the building, in order to avoid a lightning strike.

⑦ wiring cable introduced from outside the building, in order to avoid being hit by lightning, power lines, power